/*
 * This code based on Silicon Graphics, Inc.'s redbook
 * http://www.opengl.org/resources/code/samples/redbook/
 */

/*
 * Copyright (C) 2008 aki@akjava.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
 * original code license
 * Copyright (c) 1993-1997, Silicon Graphics, Inc.
 * ALL RIGHTS RESERVED 
 * Permission to use, copy, modify, and distribute this software for 
 * any purpose and without fee is hereby granted, provided that the above
 * copyright notice appear in all copies and that both the copyright notice
 * and this permission notice appear in supporting documentation, and that 
 * the name of Silicon Graphics, Inc. not be used in advertising
 * or publicity pertaining to distribution of the software without specific,
 * written prior permission. 
 *
 * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
 * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
 * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
 * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
 * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
 * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
 * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
 * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
 * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
 * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
 * 
 * US Government Users Restricted Rights 
 * Use, duplication, or disclosure by the Government is subject to
 * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
 * (c)(1)(ii) of the Rights in Technical Data and Computer Software
 * clause at DFARS 252.227-7013 and/or in similar or successor
 * clauses in the FAR or the DOD or NASA FAR Supplement.
 * Unpublished-- rights reserved under the copyright laws of the
 * United States.  Contractor/manufacturer is Silicon Graphics,
 * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
 *
 * OpenGL(R) is a registered trademark of Silicon Graphics, Inc.
 */

package com.akjava.android.openglsamples.redbook;

import java.nio.FloatBuffer;

import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.opengles.GL10;
import javax.microedition.khronos.opengles.GL11;

import android.content.Context;
import android.opengl.GLU;

import com.akjava.android.openglsamples.GLUT;


public class ClipRenderer extends RedBookSimpleRenderer {



	public ClipRenderer(Context context) {
       super(context);
    }



    public void setUpBuffers() {
    	  float eqn[] = {0.0f, 1.0f, 0.0f, 0.0f};
   	   float eqn2[] = {1.0f, 0.0f, 0.0f, 0.0f};
   	eqnBuffer=FloatBuffer.wrap(eqn);
   	eqn2Buffer=FloatBuffer.wrap(eqn2);
    }
    FloatBuffer eqnBuffer,eqn2Buffer;
    

    public void onSurfaceChanged(GL10 gl, int w, int h) {
    	gl.glViewport(0,0,w,h);
    	gl.glMatrixMode(GL10.GL_PROJECTION);
		gl.glLoadIdentity();
    	GLU.gluPerspective(gl,60.0f, (float) w/(float) h, 1.0f, 30.0f);
    	gl.glMatrixMode(GL10.GL_MODELVIEW);
    }



    public void onDrawFrame(GL10 gl) {
    	 

    	   gl.glClear(GL10.GL_COLOR_BUFFER_BIT);

    	   gl.glColor4f (1.0f, 1.0f, 1.0f,1.0f);
    	   gl.glPushMatrix();
    	   gl.glTranslatef (0.0f, 0.0f, -5.0f);

    	/*    clip lower half -- y < 0          */
    	   ((GL11)gl).glClipPlanef (GL11.GL_CLIP_PLANE0, eqnBuffer);
    	   gl.glEnable (GL11.GL_CLIP_PLANE0);
    	/*    clip left half -- x < 0           */
    	   ((GL11)gl).glClipPlanef(GL11.GL_CLIP_PLANE1, eqn2Buffer);
    	   gl.glEnable (GL11.GL_CLIP_PLANE1);

    	   gl.glRotatef (90.0f, 1.0f, 0.0f, 0.0f);
    	   GLUT.glutWireSphere(gl,1.0f, 20, 16);
    	   gl. glPopMatrix();

		
    }



	




	@Override
	public void onSurfaceCreated(GL10 gl, EGLConfig config) {setUpBuffers();
		   gl.glClearColor (0.0f, 0.0f, 0.0f, 0.0f);
		   gl.glShadeModel(GL10.GL_FLAT);
		   
		   
	}

	
}


